Victorian 10k Gold Seed Pearls & Opal Slide on GF Chain

For sale is this Victorian era, 10k rose gold (tested, not marked) seed pearl & opal slide on a rose gold filled chain. The piece measures 25" long (doubled) and the slide measures 3/8" wide. It is set with two small seed pearls & a fiery blue opal. The piece weighs 8.3 grams and has one tiny ding on the back of the slide.